<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="test"></div>

  <script type="text/javascript" src="../js/react.development.js"></script>
  <script type="text/javascript" src="../js/react-dom.development.js"></script>
  <script type="text/javascript" src="../js/babel.min.js"></script>
  <script type="text/javascript" src="../js/prop-types.js"></script>
  <script type="text/babel">
    class Login extends React.Component{
        state = {username:'',password:''}
        saveUserName=(event)=>{
            this.setState({username:event.target.value})
        }
        savePassWord=(event)=>{
            this.setState({password:event.target.value})
        }
        handleSubmit=(event)=>{
            event.preventDefault()
            const {username,password}=this.state
            alert(`你输入的用户名是：${username},密码是：${password}`)
        }
        render(){
            return(
                <form onSubmit={this.handleSubmit}>
                    用户名：<input onChange={this.saveUserName} type="text" name="username" id=""/>
                    密码：<input onChange={this.savePassWord} type="password" name='password'/>
                    <button>提交</button>
                </form>
            )
        }
    }
    ReactDOM.render(<Login/>,document.getElementById('test'))
  </script>
</body>

</html>